Duncan Campbell (Carnegie Mellon)
Thu, 23 May 2019, 11:00
"A short story of non-thermal fixed points"
Christian-Marcel Schmied
Thu, 23 May 2019, 13:00

Primordial Dark Matter Halos from fifth-forces (PLEASE NOTE UNUSUAL DATE)

Stefano Savastano , Universitŗ di Bologna
Dark matter is an essential ingredient of modern cosmology, its fundamental nature being one of the biggest open enigma in physics. I discuss the possibility to provide the entire dark matter content in form of screened dark compact objects which could be potentially generated during radiation dominated era. In the standard cosmological scenario this would be suppressed due the fast expansion rate of the Universe lead by radiative pressure. Nevertheless, the introduction of an additional long range attractive interaction stronger than gravity enhances the growth of fluctuations in the density field of a non-interacting matter fluid, which eventually collapse in Primordial Dark Matter Halos. Finally, I analyse in which conditions these structure are able to evade microlensing constraints and cosmic microwave background energy injection bounds.
Kosmologie und Elementarteilchenphysik
25 Apr 2019, 11:00
Institut für Theoretische Physik, Phil16;SR

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